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Leaf chains are actually steel chains with a simple link plate and pin construction. The chain number refers to the pitch and the lacing of the links. The chains have certain features such as high tensile strength per section area, that allows the design of smaller mechanisms. There are B- and A+ type chains in this series and both the AL6 and BL6 Series include the same pitch as RS60. Finally, these chains cannot be driven utilizing sprockets.
In roller chains, the link plates have a higher fatigue resistance due to the compressive tension of press fits, yet the leaf chain just has two outer press fit plates. On the leaf chain, the maximum acceptable tension is low and the tensile strength is high. When handling leaf chains it is important to consult the manufacturer's handbook in order to guarantee the safety factor is outlined and utilize safety guards at all times. It is a good idea to carry out utmost care and use extra safety measures in functions where the consequences of chain failure are severe.
Utilizing a lot more plates in the lacing results in the higher tensile strength. In view of the fact that this does not improve the most allowable tension directly, the number of plates used can be limited. The chains need frequent lubrication as the pins link directly on the plates, producing a very high bearing pressure. Making use of a SAE 30 or 40 machine oil is frequently advised for the majority of applications. If the chain is cycled more than 1000 times each day or if the chain speed is more than 30m for every minute, it would wear really quick, even with constant lubrication. Thus, in either of these conditions utilizing RS Roller Chains will be much more suitable.
The AL-type of chains should only be utilized under certain conditions like when wear is not a big problem, when there are no shock loads, the number of cycles does not exceed a hundred daily. The BL-type would be better suited under various situations.
If a chain utilizing a lower safety factor is selected then the stress load in parts will become higher. If chains are utilized with corrosive elements, then they could become fatigued and break quite easily. Performing frequent maintenance is vital when operating under these kinds of situations.